.check-in-button {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background-color: #3289FF;
    border-radius: 50%;
    color: white;
    /* 控制签到的字体大小 */
    font-size: 20px;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.check-in-text {
    margin-bottom: 10px;
}

/* 控制时分秒的字体大小 */
.check-in-time {
    font-size: 20px;
}